Date: Wed, 3 Oct 2012 20:26:36 +0100
From: Al Viro <viro@ZenIV.linux.org.uk>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>,
        Ming Lei <ming.lei@canonical.com>,
        Greg KH <gregkh@linuxfoundation.org>, Kay Sievers <kay@vrfy.org>,
        Lennart Poettering <lennart@poettering.net>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Kay Sievers <kay@redhat.com>,
        Linux Media Mailing List <linux-media@vger.kernel.org>,
        Michael Krufky <mkrufky@linuxtv.org>,
        Ivan Kalvachev <ikalvachev@gmail.com>
Subject: Re: udev breakages - was: Re: Need of an ".async_probe()" type of
 callback at driver's core - Was: Re: [PATCH] [media] drxk: change it to use
 request_firmware_nowait()
Message-ID: <20121003192636.GC23473@ZenIV.linux.org.uk>
References: <4FE9169D.5020300@redhat.com>
 <20121002100319.59146693@redhat.com>
 <CA+55aFyzXFNq7O+M9EmiRLJ=cDJziipf=BLM8GGAG70j_QTciQ@mail.gmail.com>
 <20121002221239.GA30990@kroah.com>
 <20121002222333.GA32207@kroah.com>
 <CA+55aFwNEm9fCE+U_c7XWT33gP8rxothHBkSsnDbBm8aXoB+nA@mail.gmail.com>
 <506C562E.5090909@redhat.com>
 <CA+55aFweE2BgGjGkxLPkmHeV=Omc4RsuU6Kc6SLZHgJPsqDpeA@mail.gmail.com>
 <20121003170907.GA23473@ZenIV.linux.org.uk>
 <CA+55aFw0pB99ztq5YUS56db-ijdxzevA=mvY3ce5O_yujVFOcA@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <CA+55aFw0pB99ztq5YUS56db-ijdxzevA=mvY3ce5O_yujVFOcA@mail.gmail.com>
User-Agent: Mutt/1.5.21 (2010-09-15)
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1341
Lines: 31

On Wed, Oct 03, 2012 at 10:32:08AM -0700, Linus Torvalds wrote:
> On Wed, Oct 3, 2012 at 10:09 AM, Al Viro <viro@zeniv.linux.org.uk> wrote:
> >
> > +       if (!S_ISREG(inode->i_mode))
> > +               return false;
> > +       size = i_size_read(inode);
> >
> > Probably better to do vfs_getattr() and check mode and size in kstat; if
> > it's sufficiently hot for that to hurt, we are fucked anyway.
> >
> > +               file = filp_open(path, O_RDONLY, 0);
> > +               if (IS_ERR(file))
> > +                       continue;
> > +printk("from file '%s' ", path);
> > +               success = fw_read_file_contents(file, fw);
> > +               filp_close(file, NULL);
> >
> > fput(file), please.  We have enough misuses of filp_close() as it is...
> 
> Ok, like this?

Looks sane.  TBH, I'd still prefer to see udev forcibly taken over and put into
usr/udev in kernel tree - I don't trust that crowd at all and the fewer
critical userland bits they can play leverage games with, the safer we are.  

Al, that -><- close to volunteering for maintaining that FPOS kernel-side...
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/